ABSTRACT
The main objective of this work is to show that Shannon Entropy (SE) calculated on continuous seismic signals can be used in a volcanic eruption monitoring system. We analysed three years of volcanic activity of Volcán de Colima, México, recorded between January 2015 and May 2017. This period includes two large explosions, with pyroclastic and lava flows, and intense activity of less energetic explosion, culminating with a period of quiescence. In order to confirm the success of our results, we used images of the Visual Monitoring system of Colima Volcano Observatory. Another of the objectives of this work is to show how the decrease in SE values can be used to track minor explosive activity, helping Machine Learning algorithms to work more efficiently in the complex problem of distinguishing the explosion signals in the seismograms. We show that the two big eruptions selected were forecasted successfully (6 and 2 days respectively) using the decay of SE. We conclude that SE could be used as a complementary tool in seismic volcano monitoring, showing its successful behaviour prior to energetic eruptions, giving time enough to alert the population and prepare for the consequences of an imminent and well predicted moment of the eruption.
Subject(s)
Disasters , Explosions , Environment , Volcanic Eruptions , ForecastingABSTRACT
Se describe una lactante femenina, de 14 meses de edad, estudiada en el Departamento de Pediatría del Hospital Central de Valencia por presentar retardo importante, pondo estatural, psicomotriz y óseo con estigmas fenotípicos característicos del Síndrome de Lange. Los estudios genéticos y endocrinológico fueron normales. El caso descrito no tiene un patrón de transmisión hereditaria establecido y aceptado. Sin embargo algunos casos reportados en la literatura mundial se han presentado en una misma hermandad como producto de uniones consaguíneas. Este caso entraría en esta situaión planteándose la posibilidad de una herencia Autosómica Recesiva aún cuando parece hacer heterogeneidad genética en las causas que puedan originar este fenotipo
